Calculations of carrier gas effects in non-dispersive infrared analyzers I. Theory

David W. T. Griffith

doi:10.3402/tellusa.v34i4.10824

Calculations of carrier gas effects in non-dispersive infrared analyzers I. Theory

Tellus

Volume 34 (1982): Issue 4

By: David W. T. Griffith

Open Access

|Jan 1982

Abstract

A theory and method of calculation is presented for determining changes in instrument response and hence apparent gas concentration which arise in non-dispersive infrared gas analyzers when gas mixtures with varying carrier gases are analyzed. The theory is based on variations in pressure-broadening in the sample cell of the analyzer and initial comparisons with experimental values for CO₂-in-air and CO₂-in-N₂ indicate good agreement between theory and experiment.

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